rcu: Upgrade sync_exp_work_done() to smp_mb()

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The sync_exp_work_done() function uses smp_mb__before_atomic(), but
there is no obvious atomic in the ensuing code.  The ordering is
absolutely required for grace periods to work correctly, so this
commit upgrades the smp_mb__before_atomic() to smp_mb().

Fixes: 6fba2b3767 ("rcu: Remove deprecated RCU debugfs tracing code")
Reported-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

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Paul E. McKenney 2019-04-20 01:40:54 -07:00

parent 714b6904e2

commit 96050c68be

1 changed files with 1 additions and 2 deletions

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kernel/rcu/tree_exp.h

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